Where to implement my Business Logic in ADF?

Hi,
I am new to Oracle ADF. I found this forum very useful to get my queries and doubts answered. Thanks to the participants.
I am basically from Struts background,
Where i design my UI in jsp pages using Struts tags,
Actions and some utility classes handles my most of the business logic (generally called as Business Layer)
Then i have custom DAOs or Data Layer to query or update the data in database.
Now as I am into new Project and I have to learn Oracle ADF.
I started learning this by following some questions in the forums and various sites (from Google).
I got info on How to create Entity Objects, Value objects etc.
But my major doubt is where shall i write my Business Logic in this stack?
I can easily drag and drop my data controls into my JSF page and create table, forms or charts. But if i have a multi line business logic, say for a Submit button, In which i may be doing the following steps -
a. Get data pertaining to user role , department, his tenure in the department etc
b. On submit do processing based on data collected in above step.
c. update data in data base.
d. initiate an approval process
e. call some business process for Approval
f. Audit Trail
g. Transaction handling
and so many other steps (I know most of you will have gone through these situation before starting work on ADF)
Now, in the above scenario in Oracle ADF layers where shall i write this whole bunch of logic or steps and then forward the user the page depending upon the outcome of this logic.
Please let me know where to write all this??
Thanks a lot,
Amit
Edited by: ur.amit on May 13, 2010 4:58 PM

Generally speaking all of that code would reside in the app module Impl classes or the View object Impl classes - for VOs and AMs you can expose subclasses and add code in there - you can then define whether any of your methods should be exposed to the client, in which case they appear in the Data Controls panel as operations.
General word of advice -keep business logic code in the Model - don't be tempted to start trying to access your AMs and do any of this stuff from the ViewController project. Keep it nice and simple and just access ALL the business logic code through ADF Model.
Hope this helps
Grant

Similar Messages

Where is the best place to implement business logic in ADF application?

I am using jdeveloper 11g R2 , JSF Facelet
Where is the best place to implement business logic in ADF application?
I mean something like service layer in Spring
Appreciate your comments
Regards
Mohsen

Depends on what your logic does and what data it deals with, but in general business logic is in the ADF BC layer.
Some goes into entity objects - for things like attribute or row validation.
Some goes into view objects - for things like calculation.
Some goes into AM - for things like service methods for UI clients.

ADF11g: business logic in ADF BC or PLSQL?

Hi All,
For a new development in ADF 11g , where we should put our business logic: In ADF BC or in PLSQL?
What if we write all the bussiness logic in plsql? Because if tomorrow ADF goes(which I know is not ging to happen soon), we can expose pl/sql as web services, and new UI technology can use it. And we will not struggle on migration, as we are struggling today from Forms to ADF.That's what my manager says......
Though I know that we can write our business logic in ADF BC, and that too can be exposed as web service.
But I still need more suggestion on this, which one is better to write bussiness logic.
Thanks
Vikram

We have a team with mixed skill sets, so consequently some of our business logic is in ADF/BC and some is in PL/SQL.
Having some in PL/SQL allows my project manager to divide and conquer the work to be done on an adf project easier than I can train the pl/sql guy to be an adf guy...supposedly.
Also our project manager is also a techy with a primarily pl/sql orientation.
I like Java better because it is new and fun for me, but that is not much of a reason.
I have been to many presentation's of Paul Dorsey's BRIM product. Paul is absolutely certain that you and your manager are doing good when you put business logic in the database. Paul goes even further. I respect him and his arguments are sound.
I still like Java better...mostly because I have done pl/sql for ages and am tired of it. :-)

Future support for using PL/SQL core business logic with ADF BC

We want to migrate our large Forms client/server (6i) application to ADF, possibly using a migration tool like Ciphersoft Exodus.
One scenario could be to use ADF BC and ADF-Faces or a different JSF-Implementation for presentation and business layer but keep our heavy PL/SQL-businesslogic inside the Oracle database in packages, triggers, functions and procedures.
This scenario could be chosen due to the huge amount of interconnected logic inside the database (10 years of development; no technical components; any package may access any table and more of this kind of dependencies). The business logic nowadays held in Forms client will be moved mainly into the database as a prerequisite to this scenario.
Choosing this "keep-logic-in-DB"-scenario we need a good support by ADF BC to do so. We know and prototyped that it is possible to call some PL/SQL via JDBC from ADF BC and it is possible to use stored procedure calls for standard business entity data access (ins, del, upd, ..). But this does not solve our problems. We want to reuse core business logic coded in PL/SQL. This is much more than change the ADF standard behavior for an update with an own PL/SQL-call.
Now my question:
Will there be a kind of sophisticated support to use ADF BC in combination with database-kept logic?
If so, when will this happen and how will the common problems of transactional state inside the database and inside the ADF BC be solved? Any plans or ideas yet?
Many other clients do have similar applications built in Forms and PL/SQL and would be glad to hear about a path of direction.
I've read the technical article 'understanding the ADF BC state management feature' which you have contributed to. One current limitation is pointed out there: Using PL/SQL with ADF BC limits ADF AM pooling to 'restricted level' which reduces scalability.
Are you aware of additional main problems/tasks to solve when using PL/SQL heavily with ADF BC, which we have to think about?
Thank you for any response.
Ingmar

My main problem is two 'concurrent' areas holding state in an application system based on DB-stored PL/SQL-logic in combination with ADF BC.
For a new System everything can be made ok:
Sure, it is possible to build a new system with the business logic included in ADF BC only. All long-living state will be handled in the BC layer ( including support for UnitsOfWork longer than the webside short HTTP-requests and HTTP-sessions and longer than the database transactions.
For an old system these problems arise:
1. DB data changes not reflected in BC layer:
Our PL/SQL-logic changes data in tables without notifying the ADF BC layer (and its cache). To keep the data in ADF BC entity objects identical to the changed database content a synchronization is needed. BC does not know which part of the application data has been changed because it has not initiated the changes through its entity objects. Therefore a full refresh is needed. In a Forms4GL environment the behavior is similar: We do frequently requeries of all relevant (base)tables after calling database stored logic to be sure to get the changed data to display and to operate on it.
-> Reengineering of the PL/SQL-logic to make the ADF BC layer aware of the changes is a big effort (notifying BC about any change)
2. longer living database transactions
Our PL/SQL-logic in some areas makes use of lengthy database transactions. The technical DB-transaction is similar to the UnitOfWork. If we call this existing logic from ADF BC, database state is produced which will not be DB-committed in the same cycle.
This reduces scalability of ADF BC AM pooling.
Example:
a) Call a DB-stored logic to check if some business data is consistent and prepare some data for versioning. This starts a DB-transaction but does not commit it.
b) Control is handed back to the user interface. Successful result of step a) is displayed
c) User now executes the versioning operation
d) Call another DB-stored logic to execute the versioning. DB-transaction is still open
e) Business layer commits the transaction automatically after successful finishing step d). Otherwise everything from a) to e) is rolled back.
-> redesign of this behavior (= cutting the 1to1 relation between LogicalUnitOfWork and the technicalDatabaseTransaction is a big effort due to the big amount of code.

Where do I write business Logic?

Hi,
Where do I write bisiness Logic?
Tutorial said "It is common practice to include the bean property and the Action
implementation to which it refers within the same bean class".
But I thought EventHander Impl is better to write business Logic
like retrieving the data from database.
Which is common use?
Or I need to choose them depending on the situation?
Thanks in advance for you help.
tomo

Thanks for the reply!!
But I am still confused.
I thought I can write business logic A and B.
What is difference between A and B ??
Hi tomo,
In the two options you provide the difference is not that much. The ActionListener instance willhave to be registered in your JSP of course to listen to the button or hyperlink with the f:action_listner tag. But in both cases your biz logic is in your ui. I think that is the wrong direction for you to head.
I think the real question should be (forgive me if I'm pulling the discussion away from your question, but I think this is relevant) where does the business logic go.
As Kito said your biz logic belongs apart from your UI logic (classic MVC approach). So in the real world what does that mean? As you suggest in option B in your last post a bean provides an action so that it can be specified via the actionRef attribute. This action in turn invokes a method on the bean it comes from which then invokes the business logic on the 'real' business logic.
The Action becomes simply a translator (or part of the Adaptor pattern from the GoF book).
For example lets say you have a bean that does biz processing like this;
public interface CatalogFacade {
public Collection getProducts(ProductSearchCriteria criteria);
}And you want to invoke that 'business logic' from your JSF UI. The button would be declared with this code
<h:comman_button id="searchCommand" type="submit"
                    label="Search"
                    commandName="search"
                    actionRef="searchBean.searchAction"/>In your searchBean you have many options to return the searchAction but I prefer the following
public class SearchBean {
   public SearchFacade searchFacade = null; // this could be a managed bean or an EJBSession or whatnot
   public ProductSearchCriteria productSearchCriteria = null; // this should be 'filled' in by the form the button is on
   private transient Action searchAction = new Action() {
    public String invoke() {
      return search();
public Action getSearchAction() {
    return searchAction;
public void search() {
    Collection products = searchFacade.search(productSearchCriteria);
    // place the products collection into the next page's bean so that is can be found via valueRef attributes
}Notice that no database hits are happening in the UI code. Also there is no business logic here either.
It is very important to keep these two concerns divided for ease of maintenance. The typical reasoning goes something like this, 'your ui is very likely to change so keep it separate from your business logic'. Other reasons to be careful about mixing UI and biz logic is the likely hood that you will get very different behavior (one probably wrong) if you have to and another client to your biz logic.
For example in the earlier product search stuff. If we needed a web service front end to the 'searchProducts' functionality and we had the db hit happening in the action or page bean we would be stuck. With the above impl we get to just put a WS over the facade and we are done.
Hope this helps.
You can also look at some of the blueprint patterns for more info. They start here;
http://java.sun.com/blueprints/patterns/index.html
While some of the EJB specific patterns might be more involved than you need they provide excelent archtectural guidence for web only apps as well.
Good luck,
-bd-

Where I put my business logic?

For example i create a simple JSP page with his DataAction. The JSP page contains a simple Input Form created with drag and drop from the Data Control Palette. The Submit button is also on the JSP page, now I want to insert the commit option without showing this to the user, like in 9.0.3 app.getTransaction().commit(); ...where I insert my source? Also if I want to insert source bevor i launch the JSP page, always using DataAction (without using BasicADFAction from Steve Muench), where can I do this? The execute method in DataAction is final!

One way to acheive auto commit is with Data Action chaining.
For ex:- You could have pageflow like:
createEmpDA ---> /createEmp.jsp
createEmpDA DataAction would create an empty row.
and forward to createEmp.jsp which will show an input form with a submit button.
Now wire the submit button as follows.
createEmpDA ---> /createEmp.jsp ---> commitEmpDA
Change the submit action in createEmp.jsp to commitEmpDA.
In StrutsPageFlow.
Drag-n-drop commit operation from DataControl palette onto commitEmpDA DataAction.
This would commit the transaction.
Page flow could end up to browseEmp JSP page which shows all the employees including the newly created one.
createEmpDA ---> /createEmp.jsp ---> commitEmpDA --> browseEmpDA ---> /browseEmp.jsp
raghu
JDev Team

The best way to implement business logic to a .JSP ?

Hi experts,
I want to implement some business logic to a .JSP file wich is in my modified
<b>com.xxxNew.portal.usermanagement.admin.pa</b>r file!
For examle creating different roles for useres by registration dependently what they inseret in the registration.jsp!
What is the best way to do this? I have tried out to create a stateless session bean for this. Is this the right way?
Can someone give me information how can I access this bean from my JSP (.par file) and how can I upload it to the portal?

Hi,
Here is the document about Calling J2EE Applications from Portal Applications:
http://help.sap.com/saphelp_nw70/helpdata/en/42/9ddf20bb211d72e10000000a1553f6/frameset.htm
So in your JSP do the lookup of your EJB.
I do not think using EJB at this level is really good, as you do not deal with DB, security and transactions in your code.
http://www.jguru.com/faq/view.jsp?EID=126400
Why not just use a portal component like JSPDynpage for this purpose?
Greetings,
Praveen Gudapati

Business logic in PL/SQL?

Hello,
I am designing a 3-tier, web-based intranet application for my client. It's going to be a WebSphere portal app with Struts, running on Oracle 8.1.7.
One of the requirements is to implement the business logic in the back-end (PL/SQL), not in Java (although that is what I'm used to do). The reason probably has something to do with fear of performance issues ("the more code runs in Oracle, the faster") and resource planning ("more people here know Oracle better than Java").
This unusual (?) choice in my humble opinion leaves me with two major issues; how to cache database results and how to perform the O/R mapping.
I know how to use CallableStatements and JDBC, but I'd really like to avoid such a solution now we have EJB 2.1 and Hibernate and everything. And without caching as done by any sensible app server I fear performance issues.
Does anyone know a tool that can perhaps generate Java code and performs the O/R mapping? Or a tool that avoids me having to implement up to a hundred (!) CallableStatements and ResultSet-To-JavaBean mappings. I've seen Apache's commons-dbutils that seems to do this.
Does anyone have experience implementing business logic in PL/SQL and calling procedures from Java? Is performance really an issue here?
Thanks in advance for any input,
regards,
Bram Rooijmans

This unusual (?) choice in my humble opinion leaves me
with two major issues; In non-trivial applications excluding all business logic from the database is usually an architecture or design bug. Businesses do use the database directly due to legacy, tools, comfort level, etc. And in those cases the data still needs to be consistent. Not to mention that for some business logic the database can be orders of magnitude faster in running it versus external logic.
On the other hand I would consider it a bug as well if someone told me that all the business logic must be in the database and no where else. (At the very least I would suspect and question their definition of business logic in that case.)
I know how to use CallableStatements and JDBC, but I'd really like to avoid such a solution now...How are you going to implement any non-trivial business logic in oracle without using stored procs?
Does anyone have experience implementing business logic in PL/SQL and
calling procedures from Java? Not sure of the question. Certainly I have implemented business logic in PL/SQL. And many people have used stored procs via java.
Is performance really an issue here?No idea. That is a dependency of your system, not of java/databases in general.
I have seen java only solutions that even with scalling take hours to do operations that could be done in much less time using the database itself.
I have seen requirements which would have taken hours even in the database and changing the requirements meant it took less than 2 minutes. (It had nothing to do with java nor the database.)
I have seen code implementations which took significant database processing time where the entire solution could have been done without the database at all.
I have seen solutions where, due to business requirements, the same business logic was implemented in different languages and in slightly different ways in each. Implementing the logic in stored procs meant that all of the systems that used it now would be using the same rules. In that case it is possible that the solution was actually slower. But if it was it was not noticed and the consistency was much more important.

Business Logic with EJB

Hi all!
I googled EJB:
Enterprise Java Beans. A standard distributed component model. The encapsulation of business logic into business objects is the most recent focus of the information Technology industry. Objectified business logic. Server components that adddress critical business functions.
I also found this:
Isolate business logic from connectivity issues, especially
connections with databases including transaction management
and security.
Meaning? What is business logic? Practically I mean...

Just don't throw your business logic (what should the program do from a user standpoint) in the same object as the technical logic (what is the programm doing in addition to implement the business logic, like storing data, loading data, converting data, etc.).

Can we use WHO columns in Business Logic implementation

Hi,
Can we use WHO columns for business logic implementation..?
From one table I need to pick up the latest record. I have a ActionDate column in the table which stores the date of the action.
But on the same day there can be multiple action records. ie Multiple records have same ActionDate.
Select * from action_table where action_date=(maximum action_date)
The above query will return more than 1 record.
Now can I use the Creation_Date which is a WHO column to identify the latest record..?
Will it introduce any issues if I use creation_date WHO column?
Usage of WHO column in application logic, Is it against the Standards ?
Thanks a lot.

I guess you are talking about populating the value using the history column creation_dt from EO.
If so, you can use then. We are using them in all our applications to populate WHO columns of our table.
Infact as far as I know, even Oracle application uses them.
They generally populate the timestamp, so you may need to format them when doing date comparisons.
Hope that helps.
Amit

How to get Custom Time Correction business logic implement for ESS in R/3?

Hi Experts,
I am in trouble of implementing the custom requirement of correcting the time in ESS. I have to implement the time corrections as per business logic.
Can any body tell me where to do this?
What I need is suppose employee DWS is from 9:30 AM to 6:00 PM and suppose he forgot to punch the In time and then corects the entry for 9:30 AM in ESS then it get inserted into the R/3 data but now requirement is if support the employee has punched but at 10:00 AM and then corrects to 9:30 AM then it does not change the 10:00 AM and we wanna deleted these 10 AM entry.
Thanks in advance.

I have solved by created enhancement spot in PT_COR_REQ
for method IF_EX_PT_COR_REQ~POST_VIA_BLOP
Regards,
Gaurav Patwari

UCES Business logic / Implementation question

Hello,
I hope this is the right forum for this, I found nothing relevant about it with the search...
I hope you can help me or perhaps at least point me in the right direction or give me some links.
It's really hard to find anything substantial about UCES on the net, so ANY help is greatly appreciated!!!
Okay here we go:
I have a requirement for a client who wants a Web 2.0 Portal with the Business logic implemented with UCES (Utility Customer E-Services)
What I now (for a start) need to know is:
1.
How is business functionality in UCES implemented? With Java or with ABAP? Does anyone know this? Are both approaches possible?
2.
How does a possible interface between UCES business logic and the frontend look like?
- JSP -> EJB -> Java Connector -> ABAP?
- JSP -> EJB ?
- JSP -> EJB -> ABAP over Web Services ?
- or other ?
Like you see, I'm really just trying to get a grip on the basics, a starting point from which to find further information. So really, anyone who has experience with this, please answer, it's greatly appreciated.
Thanks
Ralf

Hello Ralf,
This seems to be the wrong forum but a quick check and I found
Re: SAP Utilities Customers E-Services (SAP-UCES) - Documentation?
Maybe this can help.
Regards
Mark

BPEL Process with complex Business logic

Hi,
So far my knowledge,complex business logic can be implemented by different way in bpel process.
1. Business rule
2. ejb with java callout
3.ADF BC as servcie
Can anybody please suggest which approach do I need to follow,what are the pros and cons of each one,and best practices to use when and where?
Thanx in advance.-Aswini

Hi
In addition to what Naresh already mentioned, you can consider these points also.
1. If your process is complex, see if some part of the process can be common across and it can run by itself. Then you can use SubProcess concepts also. Say for example, if process involves credit card processing, it can be in a sub-process and you can call it in the main process. Like that any common approval flows can be put in a separate sub-process.
2. I would discourage using Java invocations if possible as they have some limitations and you can use reasonable amout of code in invoking java code within the bpel process. If you have lots of validations to do on a bpel process, you can consider using CallBackHandlers and do the validation on a task assignment, submission or any task action in general.
3. Business Rules can be used to control the actual flow of the process itself. Based on busiiness rule, you can decide if a set of tasks needs to be included or not in the approval flow. This is in addtion to the actual data that controls the business rules, that can be changed dynamically without the code change to core bpel process.
Which version of SOA are you using or plan to use. I would recommend the latest version SOA 11.5 + Feature Pack applied.

How to display values after doing some business logic in data action

hi guys i got the same problem but iam unable to display the values..in my display page when iam trying to do some business logic in my data action class..
can u guys help me out
iam pasting my code which iam working here
my struts-config.xml
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<form-beans>
<form-bean name="DataForm" type="oracle.adf.controller.struts.forms.BindingContainerActionForm"/>
</form-beans>
<action-mappings>
<action path="/inputform" className="oracle.adf.controller.struts.actions.DataActionMapping" type="oracle.adf.controller.struts.actions.DataForwardAction" name="DataForm" parameter="/inputform.uix">
<set-property property="modelReference" value="inputformUIModel"/>
<forward name="success" path="/inputAction.do"/>
</action>
<action path="/inputAction" className="oracle.adf.controller.struts.actions.DataActionMapping" type="order.view.InputAction" name="DataForm">
<set-property property="modelReference" value="displaypageUIModel"/>
<forward name="success" path="/displaypage.do"/>
</action>
<action path="/displaypage" className="oracle.adf.controller.struts.actions.DataActionMapping" type="oracle.adf.controller.struts.actions.DataForwardAction" name="DataForm" parameter="/displaypage.uix">
<set-property property="modelReference" value="displaypageUIModel"/>
</action>
</action-mappings>
<message-resources parameter="order.view.ApplicationResources"/>
</struts-config>
my input form uix
<?xml version="1.0" encoding="windows-1252"?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:html="http://www.w3.org/TR/REC-html40"
expressionLanguage="el">
<content>
<dataScope xmlns="http://xmlns.oracle.com/uix/ui">
<provider>

</provider>
<contents>
<document>
<metaContainer>

<head title=""/>
</metaContainer>
<contents>
<body>
<contents>
<form name="form0" method="post">
<contents>
<messageTextInput model="${bindings.password}" text="username"/>
<messageTextInput model="${bindings.username}" text="password"/>
<submitButton text="submit" event="success" destination="inputAction.do"/>
</contents>
</form>
</contents>
</body>
</contents>
</document>
</contents>
</dataScope>
</content>
<handlers>

</handlers>
</page>
my display uix
<?xml version="1.0" encoding="windows-1252"?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:html="http://www.w3.org/TR/REC-html40"
expressionLanguage="el">
<content>
<dataScope xmlns="http://xmlns.oracle.com/uix/ui">
<provider>

</provider>
<contents>
<document>
<metaContainer>

<head title=""/>
</metaContainer>
<contents>
<body>
<contents>
<form name="form0">
<contents>
<messageStyledText model="${bindings.password}" prompt="Prompt 0"/>
<messageStyledText model="${bindings.username}" prompt="Prompt 1"/>
</contents>
</form>
</contents>
</body>
</contents>
</document>
</contents>
</dataScope>
</content>
<handlers>

</handlers>
</page>
my model bean
package order.model;
public class TestBean
private String username;
private String password;
public TestBean()
public String getUsername()
return username;
public void setUsername(String username)
this.username=username;
System.out.println("the username after actions class:"+username);
public String getPassword()
return password;
public void setPassword(String password)
this.password=password;
my data Action class
package order.view;
import oracle.adf.controller.struts.actions.DataAction;
import oracle.adf.controller.struts.actions.DataActionContext;
import oracle.jbo.uicli.binding.JUCtrlActionBinding;
import oracle.jbo.uicli.binding.JUCtrlAttrsBinding;
import order.model.TestBean;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
public class InputAction extends DataAction
* Delegate to the Struts page lifecycle implementation
* {@link StrutsJspLifecycle#findForward findForward}
* @param actionContext the lifecycle context for the DataAction
* @throws Exception
protected void findForward(DataActionContext actionContext) throws Exception
// TODO: Override this oracle.adf.controller.struts.actions.DataAction method
//super.findForward(actionContext);
TestBean testbean=new TestBean();
System.out.println("this is action form"+actionContext.getActionForm());
String username=(String)((JUCtrlAttrsBinding)actionContext.getBindingContainer().findCtrlBinding("username")).getInputValue();
System.out.println("this is username"+username);
String username1=username+"hye wats up";
testbean.setUsername(username1);
ActionForward forward=actionContext.getActionForward();
ActionMapping mapping =actionContext.getActionMapping();
System.out.println("this is mapping"+mapping);
mapping.findForward("success");
// To handle an event named "yourname" add a method:
// public void onYourname(DataActionContext ctx)
// To override a method of the lifecycle, go to
// the main menu "Tools/Override Methods...".
check this out iam unable to display in my display page so help me out if any one can

No, in this case, I'm using standard JSP with ADF and struts validator.
If I don't use struts validator and there are errors (such as putting a string into a number which produces a jbo-25009), the list value will be retained.
When using the validator, it appears that it is NOT retained.
I've written some code to attempt to set the list element back, which "looks like" it's working right now.
There's still a problem with the second scenario:
1. user clicks checkbox and hits [submit]
2. get's error - you have to enter 5 address items
3. User wants to backout, so he unchecks the box and resubmits
4. The box redisplays as "checked"
SO, at that point, I thought... can't I use YOUR EXAMPLE on how to handle a checkbox.
I place some code in the reset method of the form to perform this:
map.put("AddressChangeFlag", (String) "" );
(that is, I've detected via the request that this flag is null), so I'm trying to make sure it retains it!
I do that and it runs into a problem during the processUpdateModel aT:
BindingContainerValidationForm updateForm= (BindingContainerValidationForm) actionContext.getActionForm();
//Get the binding for our particular column JUCtrlAttrsBinding checkBoxBinding = (JUCtrlAttrsBinding)updateForm.get("AddressChangeFlag");
call, with an error:
JBO-29000: Unexpected exception caught: java.lang.ClassCastException, msg=java.lang.String
java.lang.String
The value for updateForm.get("AddressChangeFlag") is "", which I'm assuming means the form field is no longer in the request object??
I'm lost at this point, and have been working on it for more than 1 day.
Thanks for responding though, and I await feedback ;)

Push messages from business logic into backing bean

In my simple web application a table with the contents of a database table is shown to the client. Now I want this table in the browser to be updated each time the db table is updated. In my business logic a jms message is fired to a specified topic each time the db table is updated. The reverse ajax stuff needed for the client update is provided by the Icefaces jsf implementation. There is a backing bean for each session which is responsible for the server side rerendering of the client. Now my question is: How do I connect the bussiness logic firing a jms message if the db table is updated, with the backing bean?
My thoughts:
1. Create a message listener for the topic. Each time the message listener receives a message it notifies the backing beans of each session to rerender the client. But how does the message listener know about the backing beans?
2. The backing bean responsible for rerendering the client adds itself as a listener. But where? As I understand it cannot be a backing bean and a jms MessageListener at the same time.
Has anyone an idea/pattern for this problem?

You could keep a list of beans that need to be notified in the application scope. (You should probably use weak references so that they may be garbage collected.) Then you JMS listener could get access to them.
Somebody posted a thread recently where they were doing something very similar, you might want to try to find it.

Where to implement my Business Logic in ADF?

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